Batman is given a clue to the whereabouts of stolen gems from a dying criminal, who warns the Caped Crusader that some of his henchmen are also seeking the loot. What he doesn't tell Batman is that the gems are booby-trapped!

On the pretense of needing money for Robin's college education, Batman opens a private detective agency, and is hired, unsuspectedly, by a bank robber the Caped Crusader is hoping to nail for his crimes.